Acquisitions and Dispositions Additional Information (Details) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($) employees	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) employees	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Receivables (less allowance for doubtful accounts of $51 in each period)		$ 3,108		$ 3,108		$ 2,788
Proceeds from Divestiture of Businesses, Net of Cash Divested				0	$ 47
Net sales		4,064	$ 4,100	7,736	7,762
Unrecorded Unconditional Purchase Obligation		100		100
Equity Method Investments		21		21
Proceeds from sale of equity affiliate				41	0
Gain (Loss) on Sale of Equity Investments		20	$ 0	20	$ 0
Inventories		1,803		1,803		1,705
Other		379		379		606
Property, Plant and Equipment, Net		2,950		2,950		3,017
Goodwill		3,602		3,602		3,669
Other assets		654		654		619
Assets held for sale		148		148		0
Accounts payable and accrued liabilities		(3,577)		(3,577)		(3,490)
Accrued pensions		(615)		(615)		(712)
Other liabilities		(837)		(837)		(864)
Liabilities held for sale		(57)		(57)		0
MetoKote Corporation [Member]
Business Acquisition [Line Items]
Net sales						$ 200
European Fiber Glass [Member]
Business Acquisition [Line Items]
Receivables (less allowance for doubtful accounts of $51 in each period)		28		28
Inventories		20		20
Other		1		1
Property, Plant and Equipment, Net		55		55
Goodwill		43		43
Other assets		1		1
Assets held for sale		148		148
Accounts payable and accrued liabilities		(34)		(34)
Accrued pensions		(20)		(20)
Other liabilities		(3)		(3)
Liabilities held for sale		$ (57)		$ (57)
Flat Glass [Member]
Business Acquisition [Line Items]
Entity Number of Employees | employees		1,200		1,200
Scenario, Forecast [Member] | Flat Glass [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses, Net of Cash Divested	$ 750